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 Post subject: BAD HEADS VS DIRTY HEADS
PostPosted: December 24th, 2009, 12:03 
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Joined: December 24th, 2007, 16:08
Posts: 1421
Location: EUROPE
Hi to all,

Have this seagate momentus 5400.2 with this in terminal:

Interface task reset
4096k x 16 buffer detected
MERCURY - 1_Disk 3.06 05-
Buzz - 27-05 16:43
Head Mask FFFF - Switch to full int.
$Head Mask FFFF - Switch to full int.
Spin Ready
3.06 05-27-05 16:46
(P)PATA Reset
$Head Mask FFFF - Head Mask FFFF -



Look the heads at the microscope i have this

Attachment:
ST-HEADS.jpg
ST-HEADS.jpg [ 38.37 KiB | Viewed 4254 times ]



Anyone have good results in Cleaning the heads like this or just find a donor heads ?


Regards

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 Post subject: Re: BAD HEADS VS DIRTY HEADS
PostPosted: December 24th, 2009, 12:08 
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Joined: March 28th, 2008, 7:52
Posts: 1466
Location: Europe, Hungary
First of all you should measure the MR sensor for judge it is worth a cleaning or not...


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 Post subject: Re: BAD HEADS VS DIRTY HEADS
PostPosted: December 24th, 2009, 14:08 
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Joined: October 23rd, 2006, 8:56
Posts: 1336
To me the heads do not look all that dirty, but then again it's hard to tell just by looking at them. Sometimes I have really good results with cleaning heads and sometimes I don't. it all depends. Sure you can try to clean the heads before sourcing for a donor drive, you can't really lose anything by doing so. On Seagate drives after giving the heads a special treatment I can often recover some data. If only certain files are needed this sometimes works well, but if you need a full image of the drive, the chances are slim.

N.C. wrote:
First of all you should measure the MR sensor for judge it is worth a cleaning or not...


I agree with Janos,

check MR sensor first.

Good luck!


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 Post subject: Re: BAD HEADS VS DIRTY HEADS
PostPosted: December 24th, 2009, 14:31 
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Joined: July 16th, 2008, 5:22
Posts: 107
N.C. wrote:
First of all you should measure the MR sensor for judge it is worth a cleaning or not...


What measurement readings can be expected from good heads in comparison to damaged or dirty ones?


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 Post subject: Re: BAD HEADS VS DIRTY HEADS
PostPosted: December 24th, 2009, 16:14 
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Joined: March 28th, 2008, 7:52
Posts: 1466
Location: Europe, Hungary
MANDR wrote:
N.C. wrote:
First of all you should measure the MR sensor for judge it is worth a cleaning or not...


What measurement readings can be expected from good heads in comparison to damaged or dirty ones?


The best if you can compare with donor drive. :P
Or with another head on the MHA wich is known good.

Anyway, a good MR is from 22-250 ohm, it depends on the head type.
The most of the longitudinar drives have 22-75 ohm, and the most perpendicular have 100-200 ohm.

Janos


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